Doing a t is a slang term that refers to a dishonest or immoral act. The word "antonym" means a word that means the opposite of another word. For the word "doing a t," some possible antonyms are behaving honorably, acting ethically, or upholding integrity. These antonyms reflect the opposite of deceit and dishonesty, emphasizing honesty and trustworthiness. It's important to choose our actions carefully and strive to do what's right, even when it's difficult. Practicing integrity and honesty in our daily lives can help build strong relationships with others and uphold a sense of personal morality.